Can't paste key licence in Reaper on pc either. When I press Paste nothing happens and Ctrl+V brings me message: "No item in clipboard to paste!" But I'm sure that I've copied it because it pastes in notepad
Same with me in Reaper with VST 64 bit version. When attempting to first paste the license after first inserting the plugin, I see a very quick blink of the license key show up in the field, then it disappears. I get the text notification that certain features are enabled without the license, but I do not end up hearing any tones or audio indicating as such.